blastdb_aliastool: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/blastdb_aliastool - from package: ncbi-blast+

You may install the required package with command apt-get install {package}

Error in other languages:
blastdb_aliastool: bevel nie gevind nie
blastdb_aliastool: comandă negăsită
blastdb_aliastool: comando não encontrado
blastdb_aliastool: commande introuvable
blastdb_aliastool: command not found
blastdb_aliastool: käsku ei ole
blastdb_aliastool: không tìm thấy lệnh
blastdb_aliastool: komanda nerasta
blastdb_aliastool: Kommando nicht gefunden.
blastdb_aliastool: kommandot finns inte
blastdb_aliastool: komut yok
blastdb_aliastool: nie znaleziono polecenia
blastdb_aliastool: níor aimsíodh an t-ordú
blastdb_aliastool: no se encontró la orden
blastdb_aliastool: no s'ha trobat l'ordre
blastdb_aliastool: opdracht niet gevonden
blastdb_aliastool: parancs nem található
blastdb_aliastool: perintah tidak ditemukan
blastdb_aliastool: príkaz nenájdený
blastdb_aliastool: příkaz nenalezen
blastdb_aliastool: команда не найдена
blastdb_aliastool: командата не е открита
blastdb_aliastool: 命令找不到
blastdb_aliastool: コマンドが見つかりません